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  <script>
    //通过JavaScript实现求1～100的所有能被3整除的整数之和，结果在控制台输出或在页面输出  
    var sum = 0;
    for (var i = 1; i <= 100; i++) {
      if (i % 3 === 0) {
        sum += i;
      }
    }
    console.log("1～100的所有能被3整除的整数之和为：" + sum);
  </script>
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